Screen flicker and migraine: why people with migraine notice it more

Updated 2026-11-02

Quick answerPeople with migraine tend to be more sensitive to flicker. Their flicker-fusion thresholds are lower than controls', and in a 2024 study 41% of participants with migraine reported a headache within four hours of viewing flickering light, versus 8% of others. On-screen flashing, GIFs and autoplay are the parts a browser can stop.

Evidence

  • Miller et al. 2024: migraine group saw phantom-array flicker more; 64% reported discomfort afterwards vs 19% of controls.
  • Controlled studies (1995, 2005) found lower critical flicker fusion thresholds in migraineurs.
  • A 2004 case report: headaches at a 60 Hz screen stopped at 75 Hz.

What a browser can and can't do

  • Can: pause GIFs and CSS animations, block autoplay, reduce motion.
  • Can't: change your monitor's refresh rate or backlight flicker.

FAQ

Can a browser extension fix monitor flicker?

No. It cannot change the backlight or refresh rate; it can only stop flashing content on web pages.

Sources

  • Miller NJ, Irvin L, Royer M, Strachan C. Visibility and annoyance of the phantom array effect varies with age and history of migraine. Lighting Res Technol, 2024. Link
  • Critical flicker frequency in migraine. A controlled study in patients without prophylactic therapy. Cephalalgia, 2005 (PubMed 15839848). Link
  • Responses to temporal visual stimuli in migraine: the critical flicker fusion test. Cephalalgia, 1995. Link
  • Headache related to a specific screen flickering frequency band (case report). Cephalalgia, 2004. Link

Not a medical device and not medical advice. Migraine Mode is a screen-comfort tool: it does not diagnose, treat, cure or prevent migraine or any other condition, and it does not replace a doctor. Its settings are based on studies of light, colour, flicker, patterns and motion; the extension itself has not been clinically tested. When to see a doctor.